I have been having a hell of a performance trying to find suitable panel sockets and plugs. It has involved spending several hours on the phone to RS, Farnell, Digikey, mouser etc. I have sent 2 x sets back to RS and received a set from Farnell (D-subs) today of which the cable entry holes are not big enough and the solder buckets are not big enough to take the 0.75mm wires.